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Head to head · Prices checked Oct 25, 2026

Redragon CASTOR K631 HE vs K708Gaming Tech vs Premium Build

Choose the CASTOR K631 HE for competitive gaming performance or the K708 for a premium, versatile daily driver.

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Quick verdict

Which one should you get?

Get the

Redragon CASTOR K631 HE

Gaming Tech

If you want

  • Features an 8000Hz polling rate for minimal input latency.
  • Equipped with Hall Effect magnetic switches and rapid trigger technology.
  • Includes adjustable actuation points from 0.1mm to 4.0mm via software.

And can live with

  • Wired-only connectivity limits placement and device switching.
  • Plastic case construction feels less premium.
  • 65% layout lacks dedicated function and navigation keys.

Get the

Redragon K708

Premium Build

If you want

  • Built with an aluminum case for a more solid feel.
  • Offers tri-mode connectivity: Bluetooth, 2.4GHz wireless, and wired.
  • Features a TFT color screen and a control knob.

And can live with

  • Heavier and larger than the CASTOR K631 HE.
  • Higher price point.
  • Polling rate is not specified, so gaming latency is less of a confirmed focus.

Bottom line

Your primary use case dictates the choice. If your main activity is competitive gaming where every millisecond counts, the Redragon CASTOR K631 HE is the specialized tool. For virtually any other scenario, including general productivity, multi-device use, or enjoying a more premium typing experience, the Redragon K708 is the more versatile and better-built option. Consider the K708 if your budget allows for its broader feature set.

What actually differs

The differences that matter

Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.

Redragon CASTOR K631 HE

Redragon K708

  • Layout size

    65%

    75%

  • Hall effect (magnetic)

    Yes

    No

    Adjustable actuation helps in games and not in normal typing

  • Rapid trigger

    Yes

    No

    Faster resets help in games and not in normal typing

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Hot-swappable

    No

    Yes

    Switch changes without soldering

KeebFinder scores

How we score
  • Redragon CASTOR K631 HE
  • Redragon K708
Performance
92
79
Build quality
43
76
Productivity
48
83
Customizability
47
73
Portability
66
77
See every spec side by side

Best for

What will you mostly use it for?

The CASTOR K631 HE is the clear choice for dedicated gaming, while the K708 wins for most other scenarios. For office work, programming, and content creation, the K708's extra keys, wireless modes, and premium features are more valuable. The CASTOR's advantage in travel is due to its lighter weight and smaller size, but the K708 is the superior platform for keyboard modding and customization.

For gaming

Pick the Redragon CASTOR K631 HE

  • The CASTOR K631 HE features an 8000Hz hyper-polling rate for lower latency.
  • It uses Hall Effect magnetic switches with adjustable actuation points down to 0.1mm.
  • It includes dedicated rapid trigger technology for faster key resets.

Full specs

Redragon CASTOR K631 HE vs K708 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

15 of 22 specs differ

Redragon CASTOR K631 HE

Redragon K708

Typing & switches

Switch options

Magnetic
Linear

Hall effect (magnetic)

Yes
No

Rapid trigger

Yes
No

Hot-swappable

No
Yes

Mount style

—
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

65%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
TFT

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

8,000 Hz
—

USB-C

Yes
Yes

Build & materials

Case material

Plastic
Aluminum

Keycaps

—
ABS, PBT

Weight

638 g
850 g

Dimensions

33 x 323 x 107 mm
43 x 335 x 140 mm

Backlight

RGB
RGB

Firmware & software

N-key rollover

No
Yes

Mac & Windows

No
Yes

Extras

Released

2026
2024

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

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Lowest price across stores, Amazon excluded.

FAQ

Redragon CASTOR K631 HE vs K708: your questions

The Redragon CASTOR K631 HE is designed for competitive FPS gaming. It features an 8000Hz polling rate, Hall Effect magnetic switches, and rapid trigger technology, which the manufacturer states helps with accurate moves and peeking. The K708 does not emphasize these low-latency gaming features in its listed specs.

Yes, the Redragon K708 has a hot-swappable PCB. The vendor description confirms it is compatible with almost all brands of 3-pin and 5-pin mechanical switches, such as Gateron, Akko, and Kaihua. This allows for easy customization without soldering.

No, the Redragon CASTOR K631 HE is a wired-only keyboard. It connects via a detachable USB-C to USB-A cable. It does not have Bluetooth or 2.4GHz wireless capabilities.

The Redragon K708 features a 1.14-inch TFT color screen. According to the vendor, it displays keyboard statuses like battery level, date, and connection mode. Users can also customize it with personalized GIF animations.

The Redragon CASTOR K631 HE is more portable. It is a 65% keyboard, making it more compact, and it weighs 638g, which is 212g lighter than the K708. The CASTOR also includes a portable strap, as mentioned in its product listing.

Yes, both the Redragon CASTOR K631 HE and the K708 feature RGB backlighting. The CASTOR offers 16.8 million color options, while the K708 lists 15 different RGB lighting modes and 7 pure colors.

Rapid trigger is a technology that allows the actuation point of a key to be dynamically reset. On the CASTOR K631 HE, it works with the Hall Effect switches to let you adjust the actuation point between 0.1mm and 4.0mm, enabling faster repeated keystrokes, which is beneficial for gaming movement techniques.

The Redragon K708 uses a gasket mount design. This structure is intended to provide a softer, more flexible typing feel by isolating the plate from the case with silicone gaskets. The vendor states it combines flexibility with stability for a comfortable experience.

The Redragon K708 has a more premium build on paper. It features an aluminum case, while the CASTOR K631 HE uses a plastic case. The K708 also includes internal sound dampening with Poron and silicone pads and a gasket mount, which are typically associated with higher-quality construction.

Yes, the vendor specification for the Redragon K708 lists compatibility with macOS in addition to Windows. The CASTOR K631 HE's vendor description mentions multi-device compatibility and a web-based driver for non-Windows systems, but does not explicitly name macOS.

The Redragon K708 comes with pre-lubed linear switches, specifically Sunuo switches according to the vendor. They have a total stroke of 3.6mm and a trigger pressure of 45±10gf. The CASTOR K631 HE uses non-contact Hall Effect magnetic switches.

The CASTOR K631 HE includes the keyboard, a keycap and switch puller, a Redragon sticker, a nano receiver (though the keyboard is wired-only), a portable strap, a USB-C cable, a user manual, and 4 spare switches. The K708 includes the keyboard, a USB-C cable, 4 replacement switches, and a user manual.

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